Results 91 to 100 of about 43,909 (261)

Design of phononic crystal for enhancing low-frequency sound absorption in mufflers

Scientific Reports
To enhance the low-frequency sound absorption capabilities of expansion chamber mufflers, a novel Helmholtz-ring phononic crystal cell was developed. This innovative design integrates ring Helmholtz resonators as the phononic crystal scatterer, which is ...
Yang Bai, Yuehua Chen, Jiahui Zheng
doaj   +1 more source

Targeted Mechanogenetics to Modulate Specific Deep Neural Circuits

Advanced Science, EarlyView.
This study introduces mechanogenetics, a nanobubble‐enhanced sonogenetic strategy for selective modulation of feeding‐related neural circuits in the mouse lateral hypothalamus. Mechanogenetic stimulation modulates feeding behavior through glutamatergic projections from the lateral hypothalamus to the ventral tegmental area, highlighting its potential ...
Xuandi Hou, Jianing Jing, Zhuohan Shi, Lei Sun   +3 more
wiley   +1 more source

Spatiotemporal Regulation of Hierarchical Assembly of Hydroxyapatite for Enamel Remineralization

Advanced Science, EarlyView.
Biomimetic repair exhibits unique advantages for enamel regeneration compared with conventional clinical treatments. An enzymatic mineralization system (EMS) is developed, where the resulting HAP nanorods hierarchically assemble into a highly ordered structure on the enamel surface through the spatiotemporal modulation of interfacial energies of ...
Zhenhang Tang, Zhisen Zhang, Yuanyu Zhou, Wenzhi Wu, Congrui Zhao, Chang Liu, Tong Shi, Wenjing Jin, Zhaoming Liu, Weifeng Fang, Qingyun Lin, Yi He, Zhijian Xie, Ruikang Tang, Changyu Shao, Zhuo Chen   +15 more
wiley   +1 more source

Broadband low-frequency diffuse sound transmission loss of multilayer composite plate-type metamaterials

Composites Part C: Open Access
Low-frequency sound insulation is one of the most challenging problems in the field of noise control engineering because of the classical mass law. Recent studies have shown that acoustic metamaterials can achieve a sound transmission loss (STL) higher ...
Boxin Chang, Shuaixing Wang, Gaoge Liang, Quanxing Liu, Yong Xiao   +4 more
doaj   +1 more source

Optical Access to Dark Excitons Via Spin–Phonon Fano Interference

Advanced Science, EarlyView.
Dark excitons in quantum dots neither absorb nor emit light and stay hidden from optical spectroscopy. Quantum interference now reveals them: light scattered by acoustic phonons interferes with a phonon‐assisted spin flip between bright and dark exciton, carving a Fano dip into the spectrum whose position gives the bright–dark splitting. Magnetic field,
Janina J. Schindler, Katja Barthelmi, Mikhail M. Glazov, Carlo Sgroi, Sven Scholz, Arne Ludwig, Andreas D. Wieck, Jörg Debus   +7 more
wiley   +1 more source

Feasibility study of silica aerogel nanocomposites application to enhance acoustic properties

سلامت و محیط, 2020
Background and Objective: Noise pollution is one of the serious environmental issue. Sound control technologies based on sound absorption and sound insulation are considered as the two widely used methods.
Mansoureh Hamidi, Parvin Nassiri, Homayoon Ahmad Panahi, Lobat Taghavi, Saeed Bazgir   +4 more
doaj  

Sound Transmission Loss of a Sandwich Plate with Adjustable Core Layer Thickness. [PDF]

Materials (Basel), 2020
Ehrig T, Dannemann M, Luft R, Adams C, Modler N, Kostka P.   +5 more
europepmc   +1 more source

A Compact and Fast Single‐Spike TTFS Encoder With Ultralow Operating Voltage for Efficient Neuromorphic Fourier Transform

Advanced Science, EarlyView.
A Pt/TaOx/V single‐spike TTFS encoder achieves ultralow‐voltage (∼0.35 V), high‐speed (∼100 ns) operation with simplified circuitry. Integrating bipolar nonuniform temporal encoding with a spiking‐DFT neuron model enables a neuromorphic FFT framework. Device‐calibrated simulations demonstrate high spectral fidelity across multitone, speech, and chirp ...
Yang Wu, Qi Wei, Junfeng Zhang, Lirou Su, Ning Mao, Beibei Huang, Jiaying Chen, Dian Huang, Shengzhong Feng, Yishu Zhang, Shuai Zhong   +10 more
wiley   +1 more source

Sound intensity: state-of-the art in noise control of buildings

Archives of Acoustics, 2014
This paper summarizes the progress that has been made in the application of sound intensity techniques related to the research of sound transmission loss in building acoustics.
A. COPS
doaj  

Modelling the Acoustic Properties of Baffles Made of Porous and Fibrous Materials

Archives of Acoustics
The research described in the article addresses the problem of measurement, prediction and practical use of the acoustic properties of materials determined in an impedance tube.
Krzysztof KOSAŁA
doaj   +1 more source